Help me out here a bit guys, I've been chasing this since I bought the truck a month ago. 2008 extended cab, the same old thing where hitting a bump will turn the door ajar light and dome light either on or off, depending on which state it's in when the bump hits. I've tried the whole WD40 thing, no change at all. I was playing around with it today, and noticed that if the truck is off, keys in the ignition, if I open the door, the chime goes off because the keys are in. Chime turns off when I close the door, but if I start the truck, the door ajar light is on. Is there a different set of switches for the key in ignition chime? Or does this tell me that I should be looking for a wiring issue, and not at the switches? Issue seems to only be with the drivers doors, passenger side seems to work just fine.
Should mention that switches in both drivers side doors have been replaced already, didn't change anything.

 

If the key is on and engine running then there would be no "don't forget the keys" chiming.

Its the same switch, it may need to be replaced.
yes, Drivers door gets used the most so would wear out faster.

You can check the wires at the boot on drivers door hinge but I would think it is the switch itself that is the problem, not wiring.

 

I don't get the "key in"chime with the engine running, I do if the truck is just sitting. But that's my point, I open the door with the truck off, and the warning chime sounds. Close the door, and it turns off, saying that it "knows" the door is closed. But if I start the truck, it will tell me that the door is ajar. That's the confusing part to me.

 

I bought my 02 ranger 6 months ago did rocker panels cab corners and one rear panel and patched few other spots and obviously primed n painted!! But anyway I just got my light to go off by tighning the bottom latch as much as I could!! Then one of my license plate lights wen out then had to use wire to come from passenger side!! But its working!! Then my speedometer stopped working !! This was 3 days ago all in the same afternoon!! And then noticed today my wipers do not work!! I'm frustrated now!!! Sorry for long message. But I could use some advice bfor I burn it!! Thanks

 

I did the lube thing and open and shut for the light to go off but didn't work for me!! My door was a bit loose tho

 

try moving the striker in a little bit maybe it will hold the door tighter

 

. Yes that'swhat iImeant by latch!! Brain fart!! It did work obviiusely!! In 3 ddaysone of my license plate lights stopped working! Fixed that my dome hasn't worked sence I bought the truck!! And messs with it the other night and since then my speedometer stopped working then my wipers and today my signal lights!!! Wtf is going on!! If anyone has an idea!! I checked fuses!! Wireng under the dash!! What next?????

 

Yeah, I think I've narrowed it down to the passenger side rear door, I can move it a bit when it's closed, unlike the drivers side which doesn't move at all. I'm going to see if I can move the striker in tighter